app/controllers/sessions_controller.rb
class SessionsController < Devise::SessionsController
include Hdo::DeviseControllerHelper
def create
setup_params_for_hdo_resource
self.resource = warden.authenticate!(auth_options)
set_flash_message(:notice, :signed_in) if is_navigational_format?
sign_in(hdo_resource_name, resource)
respond_with resource, :location => after_sign_in_path_for(resource)
end
end